Soil aggregation dynamics and carbon sequestration

• DOI: 10.31018/jans.v5i1.314
• Publication Date: 2018-04-03T20:42:03Z
• Authors: Rakesh Kumar; Kisan Singh Rawat; Jitendra Singh; Ashutosh Singh; Ashish Rai
• Keywords: Soil carbon; Soil structure; Carbon fibers

The quantity and quality of residues determine the formation stabilization aggregate structure for soil organic carbon (SOC) sequestration. Plant roots are primary skeleton to enmesh inorganic particles together build macro- microaggregates while sequestering SOC. There three major binding agents aggregation: temporary (plant roots, fungal hyphae, bacterial cells), transient (polysaccharides), persistent (humic compounds polymers). Conversion natural ecosystems into agricultural lands intensive cultivation severely depletes SOC pools. Magnitude sequestration in system depends on residence time aggregates. Microaggregates bound old C, whereas macroaggregates contain younger material. Many techniques have been used assess distribution Classical methods include determination fractions by wet dry sieving bulk soil. Isotopic including 13C 14C with mass spectrometry quantify turnover storage materials Other involve use computed tomography, X-ray scattering, microscopy examine internal porosity interaggregate attributes microaggregates. Current state-of-knowledge has not unravelled completely underlying complex processes involved sequestration, stability, dynamics, times is a need develop unique conceptual model hierarchy.